@engikeneer Ah this seem to be it. I dropped them down to 8 mm/s max change and 8 mm/s max speed and it all worked and moved exactly 100 mm.
Roughly (2 * 24V)/(200 * 3.141562653 * 27mH * 0.4A) = 7 per second. 7 * 8 mm/rev = 56 mm/second / (57/11) = 10.8 max speed? I chose 8 mm/s just to test. Will test more.
Thanks guys.